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Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace

A cement rotary kiln and precalciner technology, applied in cement production, rotary drum furnace, clinker production, etc., to reduce environmental pollution, reduce gas emissions, and improve energy utilization

Inactive Publication Date: 2008-06-11
LAIWU IRON & STEEL GRP
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Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a method for utilizing surplus gas in iron and steel production in cement rotary kiln precalcining furnace, so as to solve the problem of utilization of surplus gas and reduce pollution to the environment, so as to achieve the purpose of energy saving and emission reduction

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  • Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace

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Embodiment 1

[0018] A method for utilizing surplus coal gas from steel production in a cement rotary kiln precalciner. The process flow is shown in Figure 1. It includes the gas stabilization and transportation process, and the combustion and heating process of the gas in the calciner. Its characteristics are: It mainly includes the following steps:

[0019] A. The coal gas with large pressure fluctuations in the steel production process is transported to the gas stabilizer tank through the gas pipeline. After the gas is stabilized by the stabilizer tank, the gas is sent into the burner by adjusting the gas flow control valve, and the gas is burned After the device is sprayed into the pre-combustion chamber for pre-combustion, it enters the combustion chamber and forms a high-temperature flame in the combustion chamber to pre-decompose the cement raw meal;

[0020] B. Cement raw meal enters the tertiary air pipe through the four-stage discharge pipe, and is blown into the combustion chamber co...

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Abstract

Provided is a method of using surplus gas of iron and steel production to produce cement in a predecomposition furnace of a rotary kiln, belonging to the technical field of calcining cement clinker and including a process of voltage stabilization and transformation of coal gas, a process of burnt and heat calcinations of the coal gas in the predecomposition furnace. The coal gas is burnt sufficiently and used in the predecomposition process of the cement raw meal. The coke-oven gas, blast furnace gas, converter gas and high coke mixed gas left in the process of metallurgy production can take place coal powder as fuel to decompose carbonate in the cement raw meal. The invention has the advantages that the manufacture technique can reduce environmental pollution caused by burning coal, increase the utilization ratio of the surplus gas in iron and steel companies, and reduce the exhaust of coal gas, thereby having good economic benefit and social benefit.

Description

Technical field [0001] The invention relates to a method for utilizing surplus gas in steel production in a cement rotary kiln precalcining furnace, and belongs to the technical field of cement clinker calcination production. Background technique [0002] At present, most of my country's cement clinker production adopts new dry-process rotary kiln production technology. The cement rotary kiln system is composed of four parts: suspension preheater, decomposition furnace, rotary kiln and cooler. The precalcining kiln is characterized by the addition of a decomposition furnace between the suspension preheater of the suspension preheating kiln and the rotary kiln, which uses the heat of injecting coal powder into the decomposition furnace to decompose the carbonate in the clinker calcination process The process is basically complete. At this stage, the domestic new dry-process cement production line uses pulverized coal combustion in the calciner to supply the heat required for the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/43F27D23/00F27D3/00F27B7/20F27D99/00
CPCY02P40/121
Inventor 孙庆亮刘智伟吕新锋孙进闫志华孙业新
Owner LAIWU IRON & STEEL GRP
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